seeing tht budget... i will recommend 1.pioneer, 2.kenwood, 3.clarion, 4.JVC... based on the functions, and durability...

and no point looking at eclipse, alpine, naka if you jus wan to listen to music while driving... cuz it will a waste of money to buy such good HU and not using them to the fullest... and if i were you i would jus look for the lowest range of some trusted brands and compare the functions available then buy the ones tht offers the most functions... no need yo look at the RCA output offered... cuz you wont be using them... so it pretty much useless to you....

lastly, you may wan to avoid sony...

cheers...